Moving picture projector



May 17, 1932; J. :3v CONTNER MOVING PICTURE PROJECTOR Filed April 6, 1929 2 Sheets-Sheet 1 zfl'z 9' ATTORNEY May 17, 1932. .1. B. CONTNER MOVING PICTURE PROJECTOR I Filed April 6, 1929 2 Sheets-Sheet 2.

$732726), NVENTOR ATTOR NEY Patented May 17, 1932 J. BURGI CONTNER, OF LAKELAND, FLOR-IDA MOVING PICTURE PROJECTOR Application filed April 6, 1929.

This invention relates to improvements in projecting machines for moving pictures, the general object-of the invention being to provide means whereby the machine car be easily i and quickly changed from a machine for use with ordinaryfilms to use with the films having sound grooves on a part thereof for use with talking movies.

This invention also consists in certain other 10 features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described, illustrated in the accompanying drawings and specifically pointed out in the appended claim.

In describing the invention in detail, reference will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in which Figure 1 is a view of one face of the film trap.

Figure 2 is a view of the opposite lace thereof, with parts in section.

Figure 3 is a View showing the relative positions of the trap and lens adapter, parts of the trap being shown in section.

Figure 4 is a similar view, but the view being taken at rightangles to Figure 3.

Figure 5 is a view showing how the eccentric lens cooperates with the small opening in the slide.

Figure 6 is a view showing how the concentric lens cooperates with the large opening in the slide.

Figure 7 is a view of the slide.

In these drawings, the letter A indicates the film trap, the letter B the carrier for the projection lens and the letters C and D indicate the adapters, the adapter C having a concentrically arranged opening therein for receiving a lens 1 and the adapter 1) having an eccentric opening therein for receiving a lens 1. Each lens is held in its adapter by the set screws 3 and each adapter is of cylindrical shape with a flange 4 at its front end which carries rearwardly extending pin 4 for engaging a hole 5 in the adapter clamp 6. This clamp is the regulation lens holder used on standard moving picture projectors, though it is machined to take the adapter.

Serial No. 353,105.

This clamp is tightened on the adapter by the turn screw 7 provided with the handle 8.

A plate 9 is slidahly supported in the film trap by the guides 10 fastened to the trap, said plate being formed with an opening 11 which is of the same size as the opening 12 in the trap and it is also formed with an opening 13 of smaller size than the opening 11. This opening 11 is of the standard size for use with ordinary films, while the opening 13 is used with films having sound grooves on one edge thereof. This plate can be moved to place either of the openings 11 and 13 opposite the opening 12 by a handle 14 attached to the plate and the plate is held in either one of its two positions by the detent 15.

From the foregoing it will be seen that when the projecting device is used with films without sound grooves therein, the plate 9 is moved to a position to place the opening 11 opposite the opening 12 and the adapter C is placed in the clamp 6, but when a talking film is to be used, the plate 9 is positioned with the small opening 13 opposite the opening 12 and the eccentric adapter D placed in the clamp 6 so that the light rays are prevented from passing through that portion of the film which carries the sound grooves, due to the small size of the opening 13, and

as the lens 1 is held in an offset position by the adapter D, the light rays are properly focussed through said small opening 18 so that the resultant picture on the screen will be of standard size. The lens 1 is of a wider angle than the lens 1 so that the image is magnified to a greater extent.

It will thus be seen that I have provided simple means whereby a projector can be used with standard films without the talking feature, or with films combining the talking v J. BURGI CONTNER. 

